From 467ece892059feb59e4105ef96237b80c6407102 Mon Sep 17 00:00:00 2001 From: Guy Harris Date: Mon, 31 Jan 2005 03:03:02 +0000 Subject: From Florian Lohoff: Redback SmartEdge SE400/800 tcpdump disassembly. svn path=/trunk/; revision=13212 --- epan/dissectors/packet-redback.c | 154 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 154 insertions(+) create mode 100644 epan/dissectors/packet-redback.c (limited to 'epan/dissectors/packet-redback.c') diff --git a/epan/dissectors/packet-redback.c b/epan/dissectors/packet-redback.c new file mode 100644 index 0000000000..250b0e20bf --- /dev/null +++ b/epan/dissectors/packet-redback.c @@ -0,0 +1,154 @@ +/* packet-redback.c + * + * $Id$ + * + * Ethereal - Network traffic analyzer + * By Gerald Combs + * + * Start of RedBack SE400/800 tcpdump trace disassembly + * Copyright 2005 Florian Lohoff + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include +#include +#include "etypes.h" +#include +#include +#include "packet-ip.h" + +static int proto_redback = -1; +static gint ett_redback = -1; + +static dissector_handle_t ipv4_handle; +static dissector_handle_t eth_handle; +static dissector_handle_t clnp_handle; +static dissector_handle_t arp_handle; + +/* wrapper for passing the PIC type to the generic ATM dissector */ +static void +dissect_redback(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + guint8 l3off, dataoff, proto; + guint32 context, flags; + guint64 circuit; + guint16 length; + proto_item *ti,*tisub; + proto_tree *subtree = NULL; + tvbuff_t *next_tvb; + + context = tvb_get_ntohl(tvb, 0); + flags = tvb_get_ntohl(tvb, 4); + circuit = tvb_get_ntoh64(tvb, 8); + + length = tvb_get_ntohs(tvb, 16); + + proto = tvb_get_ntohs(tvb, 18); + l3off = tvb_get_ntohs(tvb, 20); + dataoff = tvb_get_ntohs(tvb, 22); + + ti = proto_tree_add_text(tree, tvb, 0, length, "Redback"); + + subtree = proto_item_add_subtree(ti, ett_redback); + tisub = proto_tree_add_text (subtree, tvb, 0, 4, + "Context: 0x%08x", context); + tisub = proto_tree_add_text (subtree, tvb, 4, 4, + "Flags: 0x%08x", flags); + tisub = proto_tree_add_text (subtree, tvb, 8, 8, + "Circuit: 0x%" PRIx64, circuit); + tisub = proto_tree_add_text (subtree, tvb, 16, 2, + "Length: %u", length); + tisub = proto_tree_add_text (subtree, tvb, 18, 2, + "Protocol: %u", proto); + tisub = proto_tree_add_text (subtree, tvb, 20, 2, + "Layer3 Offset: %u", l3off); + tisub = proto_tree_add_text (subtree, tvb, 22, 2, + "Data Offset: %u", dataoff); + next_tvb = tvb_new_subset(tvb, l3off, -1, -1); + + /* Mark the gap as "Data" for now */ + if (dataoff > l3off) { + proto_tree_add_text (subtree, tvb, 24, l3off-24, "Data"); + } + + /* + * Just a guess - In case we see a difference in dataoff vs l3off + * we assume there is an ethernet header. Traces from an OC12 didnt + * show any header in here + */ + if (dataoff > l3off) { + call_dissector(eth_handle, next_tvb, pinfo, tree); + } else { + switch(proto) { + case 0x01: + /* + * IP - We assume IPv6 has a different protocol although + * i might be wrong - Havent seen any traces + */ + call_dissector(ipv4_handle, next_tvb, pinfo, tree); + break; + case 0x02: + /* + * It is CLNP although it seem the Packet Asic fills + * some data in the packet so we have a "broken" packet in + * the trace + */ + call_dissector(clnp_handle, next_tvb, pinfo, tree); + break; + case 0x04: + /* ARP - Always eth header in front */ + call_dissector(eth_handle, next_tvb, pinfo, tree); + break; + default: + tisub = proto_tree_add_text (subtree, tvb, 24, length-24, + "Unknown Protocol %u", proto); + break; + } + } + return; +} + +void +proto_register_redback(void) +{ + static gint *ett[] = { + &ett_redback, + }; + + proto_redback = proto_register_protocol("Redback", "Redback", "redback"); + proto_register_subtree_array(ett, array_length(ett)); + +} + +void +proto_reg_handoff_redback(void) +{ + dissector_handle_t redback_handle; + + ipv4_handle = find_dissector("ip"); + eth_handle = find_dissector("eth_withoutfcs"); + clnp_handle = find_dissector("clnp"); + arp_handle = find_dissector("arp"); + + redback_handle = create_dissector_handle(dissect_redback, proto_redback); + dissector_add("wtap_encap", WTAP_ENCAP_REDBACK, redback_handle); +} + + -- cgit v1.2.3